geiswold



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P. C. GRISWOLD. GAS ENGINE; N0.,584,130. Patented June 8,1897.

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(No Model.) 3 Sheets-Sheet 2.

F. C. GRISWOLD.

GAS ENGINE No. 584,130. Patented June 8,1897.

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F. O. GRISWOLD. GAS ENGINE.

No. 584,130. Patented June 8,1897.

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UNITED STATES PATENT OFFICE.

FREDERICK C. GR-ISIVOLD, OF PORT JEFFERSON, NE\V YORK, ASSIGNOR OF ONE'IIALF TO MARTIN L. CHAMBERS, OF SAME PLACE.

GAS-ENGlNE.

SPECIFICATION forming part of Letters Patent No. 584,130, dated June 8, 1897.

Application filed November 25, 1896. Serial No. 613,367. (No model.)

To all whom it may concern/.- with a port i and the valve J with a port j, Be it known that I, FREDERICK C. Gnisopening on opposite sides of the valve-shaft, WOLD, of Port Jefferson, in the county of Sufso that when the port 2' registers with the open- 55 folk and State of New York, have invented a ing E the valve J closes the exhaust-opening 5 new Improvement in Gas-Engines; and I do F, and when the valve I closes the opening E hereby declare the following, when taken in the port j registers with the exhaust-port F. connection with the accompanying drawings Secured to the shaft K is an eXploder-plate and the letters of reference marked thereon, M, which projects into the gas-chamber G, 60 to be a full, clear, and exact description of and depending into the gas-chamber G, into the same, and which said drawings constitute the path of the exploder-plate, are firing-pins part of this specification, and represent, in O, supported by a firingpin cap P, which Figure 1, an end view of an engine 0011- closes the gas-chamber Gr, and from these structed in accordance with my invention; pi-nswires eXtendto an electric battery. (Not 65 Fig. 2, a sectional view of one of the cylinshown.) \Vithin the cylinder is a piston Q,

I5 ders enlarged; Fig. 3, a side view of the cenconnected by a connecting-rod B, with the tral portion of the crank-shaft, showing its crank S of the crank-shaft C. The valvecrank and connecting-rods mounted thereon; cranks L are connected by valve-crank-con Fig. l, a diagram illustrating the operation necting rods or links T. 70 of the engine. To operate the valve-cranks, I couple to one This invention relates to an improvement of the valve-cranks, and preferably the lower in gas-engines, the object being to increase one L, a gear-wheel V, which meshes with a the power of such engines and to so distribgear-wheel U on the crank-shaft O, the diute the power as to act upon the crank-shaft ameter of the wheel U being one-half that of 75 at different points in its revolution, so that the wheel V, so that the crank-shaft may practically a continuous power is exerted make two revolutions while causing the valvethereon; and it consists in arranging a plucranks to make one revolution. rality of cylinders and connecting-pistons The operation within each cylinder is as therefrom to the crank-shaft and so timing follows: WVhen the piston Q, is ready to de- 80 the explosion of gas in the cylinder as to exert scend, the port I registers with the inlet E,

their power at different points in the revoluso as to allow gas to enter the chamber G.

tion of the crank-shaft and once in each cyl- As the piston completes its downward moveinder during two revolutions of the crank ment the valve I closes the port E, and upon shaft, and in certain details of construction, the return stroke of the piston the gas Within 8 5 as will be hereinafter described, and particuthe chamber is compressed. Just as the pis- 3 5 larly recited in the claims. ton reaches its up position the eXploder-plate Preferably and as herein shown I employ N comes in contact with the firing-pins O, a pentagonal casing A, suitably supported completing the electric circuit, creating a upon a base E, through which casing a crankspark which ignites the gas within the cham- 9o shaft O extends, and in each side of and openher and forces the piston Q downward. When inginto the casing isa cylinderl). Each cylit reaches its down position for the second inder, as shown in 2, is formed with an time, the valve-shaft in constantly revolving inlet-port E, an exhaust-port F, gas-chamber is turned, so that the port j of the valve .I G, and cooling-water spaces H, all substanregisters with the exhaust-opening F, and 5 tially in the usual manner. Entered into taupon the return of the piston the products .5 pered openings in one side of the cylinder is of combustion are forced outward through the a hollow tapered valve I, and into a correopening F, and just as it reaches this last posponding opening in the opposite side is a sition the opening F is closed and the openhollow tapered valve J, said valves being ing E opened. It will thus be seen that the 100 keyed to a valve-shaft K, which has a valvepiston operates once by the explosion of gas crank L at one end and receives nuts N at the and once under the action of the crank-shaft. opposite end, by which the valves are crowded The five cylinders are soconnected and timed into their seats. The said valve I is formed to operate alternately, as illustrated in the diagrammatic view Fig. at. Thus the explosion in cylinder No. 1 turns the crank-shaft from a to Z), and when just beyond the center the gas in cylinder No. 3 is exploded, which forces the crank-shaft to c, or just beyond the central line from cylinder No. 5, when the explosion therein forces the crank-shaft to d, just beyondthe line from cylinder No. 2. An explosion in cylinder No. 2 forces the crank-shaft from d to a, when the explosion in cylinder No. 4 returns the crank-shaft from 6 to a. Thus the five explosions have caused the crank-shaft to make two revolutions, and hence the piston in each cylinder has made two complete movements, as before described, one under direct action from the explosion of the gas and the other under the a'ction of explosion in the other cylinder. fhe power is thus distributed throughout the rotation of the crank-shaft, and by't'hus alternating the operations in the cylinders sufficient time is gained to properly fill with and compress gas in each cylinder before explosi'on ,-and causes a' constant pressure upon the crank-shaft. While I prefer toexpl'od'e the gas in the chamber by mea'n'sof the explod'er-plateand electric fire-points, it may be exploded in the manner usually employed in gas-engines." In order that the connecting-rods may extend into directconnectionwith the crank S-of the crank-shaft, it will benecessary to arrange the cylinders in different planes.

If desired, the casing may be filled or nearly filled with oil orother lubricating material so that the piston will work freely, the'oil displaced by the downward movement of one piston replacing the space left by the upward movement' of the other piston.

I am aware that-engines having a plurality of cylinders, with pistons arranged to operate at different points during the revolution of the crank-shaft,-have been used, and thereforedo notw-ish to beunderstood-as claiming such as my invention; but,

Having thus fully described my invention,

what I claim, and desire'to secureby Letters Patent, is-- 1. In a gas-engine the combination with a' casing and a crank-shaft mounted therein of an odd number of cylinders arrangedconcentric'to'sa'id shaft,-pistons'in said'cylinders connected to the crank-shaft by connectingrods each cylinder formed with a gas-chamber and inlet and outlet openings, valves adapted to-open and close said openings-and connected-bya shaft having a crank extending beyond one side of the cylinder, said valve-cranksconnected together by links'so alternate cylinders and connections between the crank-shaft and valve-cranks, whereby the valvecranks make one-half as many revolutionsas the crank-shaft, substantially as described.

necting said pistonswith the said crank-shaft, each cylinder formed with a gas-chamber and inlet and outlet openings, valves adapted to agas-chamber and inlet andou'tlet openings,

2. In a gas-engine the combination with a frame supporting a crank shaft of five cylinders arranged concentric to said shaft and a piston in each cylinder, connecting-rods conopen and close said openings and connected ;'by asha'ft having a crank extending beyond one side of the cylinder, said valve-cranks crank-shaft and one of the valve-cranks whereby the valve-cranks make one-half as many revolutions as the crank-shaft, substantially as described.

3'. In' a gas-engine, the combination with a pentagonal closed casing supporting a crankshaft' of five cylinders arranged concentric .tosaid shaft and pistons in each cylinder, and

aconnecting rod connecting sai'dpiston's with sa -idcrank-sh-aft, each cylinder formed with v 9 valves adapted to open and close said openingsand connected by a shaft having a crank extending beyond one side of the cylinder. said valve-cranks connected by links so as to be uniformly turned, the valves on said sliafts'flbein'g so timed that explosion occurs in" alternate cylinders,1and gear-wheel on said crankshaft meshing with a gear-Wheel on one of the valve-shafts, the wheel on the crank-shaftbeing of one-half the diameter too of the wheelon' the valve-shaft,- substantially as described.

4.; In'a' gas -engin'e tliecombination' with a casing and aerank shaft mounted'therein of a plurality of cylinders arranged concentric to said shaft, piston's in said cylinders connected with the crank-shaft by connectingrods; each" cylinder formed with a gas-chain- :berf and inlet and outlet opening valves adapted to-openandclose said openings, and

connected by'a' shaft having'a crank extendingbeyond'one'side'of the cylindeijsaid valvec'ranks connected altogether'by linksso as to be uniformly turned, the valves on'said shafts and adapted tobe'brought into contact with said firing-pins and-connections between the no crank-shaftand links, whereby the valvecranks' mak-e half as many revolutions as' the I crank-shaft, substantially as described. as to be uniformly turned,the valves'on said shaft being so timed that explosion occurs'in' In testimony whereof I have signed this specification in'the presence'of two subscrib- I2 5 ing witnesses. I

FREDERICK O; GRlSWOLDi W'itnesses:

FRED. O. EARLE, LILLIAND. KELSEY. 

